Disk device and method of generating signal representing head

Abstract

A signal processing device for analog-to-digital converting a burst signal has a feature of selecting a data bus to notify a disk control device of a conversion result via an NRZ data bus. The disk control device stores the result of the analog-to-digital conversion of the servo positional signal. The positional signal of a head of the disk device is digitized in a R/W channel. Sampling for digital conversion is performed in only a window which is defined only in the vicinity of peaks of the positional signal. The values of peaks which are obtained by sampling are averaged by an averaging circuit. This enables the influence of noise occurred outside of the window to be eliminated. Although the noise in the window is sampled, its adverse influence is suppressed by the averaging processing.

Description

[0001]This is a continuation application of U.S. Ser. No. 10 / 200,509, filed Jul. 23, 2002, now U.S. Pat. No. 6,563,656; which is a continuation application of U.S. Ser. No. 09 / 716,326, filed Nov. 21, 2000, now U.S. Pat. No. 6,445,522; which is a divisional application of U.S. Ser. No. 08 / 857,171, filed May 15, 1997, now U.S. Pat. No. 6,172,828.BACKGROUND OF THE INVENTION[0002]a) Field of the Invention[0003]The present invention relates to a disk device, and in particular to a circuit for processing servo information and a method of generating a signal representative of the position of a head for reading / writing data in an auxiliary storage of an electronic data processing device using a disk type storage medium.[0004]b) Description of the Related Art[0005]As personal computers have recently been improved in performance and their costs have been reduced, data storage devices, in particular magnetic disk devices, are strongly demanded to provide a large quantity of storage capacity an...

AI Technical Summary

Benefits of technology

[0052]Accordingly, it is an object of the present invention to provide an economical and highly reliable disk device in which the above menti

Problems solved by technology

Operation noise will give an adverse influence to the A/D converter 24.

This results in an increase in manufacturing cost.

This is not a good idea.

If the CPU serial I/O 92 shown in FIG. 2 is used at this time, it would take a longer period of time to read the burst registers so that it is not suitable for fast servo control.

Another problem will occur in this case.

There is a risk that the A/

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